According to court documents obtained by The Blast, Otunga has filed a motion to force The Voice judge to give her testimony under oath as he believes it will assist his arguments.
The judge has not yet made a decision but has ordered a hearing on the proposition.
The former couple are also awaiting an upcoming hearing for Hudson's prior motion to ensure Otunga is actively seeking employment.
They are set to appear in court in May 2019 to judge the outcome of their trial, which they'd previously postponed in attempt to settle the case.
Readers know Hudson, 37, and Otunga, 39, were together for a decade before splitting in November 2017.
Since then, they have been back and forth in court, filing motions and accusations against each other.
She filed an emergency order of protection accusing the former wrestler of "increasingly aggressive, threatening and harassing behavior," including intimidating her with a gun and taking their son David Jr. away without her permission.
Hudson, who was recently replaced on The Voice by John Legend, claimed Otunga also instructed their son to record footage of her recording sessions as he insisted she was dating a producer.